Regulator for the gas supply



0612.- 25, 1932.v F, w, s'rc'yKMEYER 1,884,349

REGULATOR FOR THE GAS SUPPLY is-Sheet 1 Filed Jan. 12, 1951 Il sa l l f 3 O i ,l 'l l/ 32N l l 8 oct. 25, 1932. F w, STOCKMEYER l l 41,884,349

REGULAroR FOR TH GAS SUPPLY Filed Jan. 12, 1931 2 Sheets-Sheet 2 l overcome-this diliculty and consists in that Plantea oa z5. 1932.

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r/ BOSCH AXTIDTGESELLSCHAIT, l' STUTTGAKBT, GEBIANY REGULATOR IOR THE GAS SUPPLY Application nled 'January 18, 1981, Serial lo. 598,857, and in Germany Inu!! l). 1880.

This invention relates to the regulators for gas 'heated hot water arrangements whlch are operated by the drop ofv pressure occurl that the stroke or lift of the mam gas valve is completely dependent uponthe stroke `or lift of the hydraulic valve. As a resultthe h draulic valve usually consisting of a diaphrragm has to have a great liftso that it quickly becomes worn out. fi;

The present invention has been devised to the gas valve operated'by the hydraulic valve is arranged as a controlling valve in a controlling gas pi e which connects the hi h pressure side o the main gas valve with t e controlling pressure side of the same, which is adapted to be opened to atmosphere. It

is possible by this arrangement to operate the main gas valve by the hydraulic valve without any mechanical coupling only by means i of the pressure of an auxiliary current of gas member.

and to regulate the. stroke of the main gas valve independently of the lift of the hydrau lic valve.

The invention consists further in that both sides of the controlling as valve are connected to the Ventilating pipe of the main gas valve by channels provided with throttle A thermostat-valve which automatically closes when the lighter llame is extinguished is arranged in the Ventilating pipe. The gas pipe leading to the lighterburner is preferably used as av Ventilating pipe for the controlling-chamber of the main gas valve. A

A further feature of the invention consists in that the throttle in the water pipe at which the differential-pressure serving for the op erationof the hydraulic valve isproduced is connected by a hollow shaft supporting the throttle element to the controlling chamber of the hydraulic valve, the diaphragm walls of which support and guide the hollowshaft.

s Two forms of construction -of the invention are shown by way of example in the'accompanying drawings.

Figure 1 is a section through a controlling gas valve which is integral with the hydraulic valve device. i; Figure 2 shows the connection of this mechanism to a preure controlling main gas valve and to a lighting burner, supervised y a thermostat. i

s Flgures 3-6 diagrammatlcally illustrate the".

method of operation of a gas valve of this type in an arrangement for heating water, for example a geyser for supplying hot water to a bath.

Figure 7 is a section through a gas valve and a hydraulic valve device arranged separately.

The hydraulic valve 'shown in Figure 1'. comprises two water chambers 1 and 2 and a gas chamber 3 which is located therebetween and is provided with a controlling gas valve 9. The water chamber 1 is connected by a connecting tubeV 4 to ,the water feeding pipe.

yThe water can flow out of the chamber 1 to a '75 hot water boiler through a Venturi restriction 5 and a tube 5a connected thereto. The two water chambers 1 and 2 are separated from the gas chamber 3 by diaphragms 6 and 7. The centres of the diaphragms are conv nected together-by a hollow shaft 8 which is guided by them and carries the plate valve 9. Thisl plate valve is adapted to rest on a seating 10 in the gas chamber 3 and thereby divides this chamber into two compartments 11 and`12. The compartment 11 has a bore 13 for theV connection of the compartment to the main gas pipe, whilstk the compartment l12 has a bore 14 for the connection of the compartment to the controlling chamber nected through transverse channels 20 to the passage space ofthe Venturi restriction 5 at a point Where there is the greatest velocity of flow. The opposite end of the bore 19 opens into the Water chamber 2. Springs 21 tend to lift the plate valve 9 from its seating l0.

The channel 13 of the gas chamber 3 is connected through a pipe 31 (Figure 2) tothe high pressure chamber 32 within the casing 33 of the main gas valve into .which the main gas pipe 34 also opens. From the space 32 which serves as a controlling chamber for the main gas valve 38, a second space 35 of the casing 33 is separated by a diaphragm 36. This second space is connectedthrough a pipe 37 to the channel 14 of the controlling gas valve 3. A plate valve 38 which is forced by a spring 39 on to its seating on a channel 40 leading to the gas consumer, for example to the main burner 51 of the geyser is mounted on the diaphragm 36.

A pilot lighter pipe 41 passes from the connection 17 of the controlling gas valve 3 to a pilot lighter burner 42. This lighter burner consists of a casing 43, a valve 44 having a bore 45 and a liffhter nozzle 46, and a thermostat 47 the @mis of which are fixed to the burner casing by arms 48 and which is further connected to the valve 44 by arms 49.

The method of operation of the mechanismv is explained in` Figures 3-6. The hot water generator is represented by a coiled tube 50 above a burner 51 and water is drawn oil' at the tap 52. *For the sake of simplicity, the lighter burner 42 is shown without a thermostat.

Figure 3 shows the arrangement whenthe tap 52 is closed. The water pressure in both chambers 1 and 2 of the hydraulic valve is equalized by the bore 19 of the hollow shaft As a result of this'fact the spring 21 forces the diaphragms 6 and 7 upwards and Ilifts the controlling gas'valve 9.. The high gas pressure is transmitted from the main4 pipe 34 through 32, 31', 11, 12 and 37 to the chamber 35 to equalize the pressure on each side of the diaphragm so that` the spring 39 con uently forces the main plate valve 38 The lighting burner 42 is o n to 1ts seating. closed, because .its valve 44 is pressed on to its seating by the cold thermostat. Gas canne' therefore, either escape from the lighting b rner 42 or from the heating burner 5l.

v If the tap 52 is opened the water flows into the hot water generator and into the hydraulic valve. The water passing from the feeding pipe through the venturi 5 produces a vacuum 'at the openings 20 so that a vabuum 1s also -produced Within the water chamber 2 through the channel 19. On that 'account the diaphrams 6 and 7 fall until the' controlling valve 9 is pressed on to its. seating. However, as long as no gas can escape out of the lighting burner 42 the gas pressure remains the same as before in the two chambers l1 and 12, and therefore, also in the chambers 32 and 35 of the main gas valve 33 which are in communication with them. There is, therefore, no difference in pressure on both sides of the diaphragm 36 of the main gas valve, so that this remains closed. While the pilot light 42 remains unopened water therefore can be drawn from the device without the main gas valve 33 being influenced thereby (Figure 4).

The state of affairs is rather dierent however when the lighter fiance is or has to be lighted. `First of all it is assumed that the various parts are again in the position shown in Figure 3, i. e. the water tap 52 should be closed and the plate valve 9 consequently raised whilst the main gas valve 33 is closed. The thermostat 47 (Figure 2) of the lighter burnenis now heated by a match land the lighter valve 44 opened thereby, so that the gas issuing therefrom is ignited by the flame of the match. A reduced pressure is produced behind the throttling connections 16 and 17 (Figure 5) by the escape of the lighter gas. The gas pressure only remains equalized in the chambers 11 and 12 because they are connected together by virtue of the fact that the controlling gas valve 9 is open. For that reason the main gas valve does not yet open (Figure 5) .I If, however, the Water tap 52 is opened a drop of pressure takes place at the throttling place of the venturi 5 through the Water flowing out. The drop of pressure is transferred into the water chamber 2 through the hollow shaft 8 or the bore 19 of the same so that there arises a difference in pressure between the water chambers 1 and 2 and the controlling gas valve 9 is pressed on to its seating. The chambers 11 and -12 of the controlling gas valve 3 are now separated from each other. The lighter gas Howing from the closed chamber 12 of the controlling gas valve 3 to the pilot light burner 42 produces a drop of pressure inthe controlling chamber 35 of the' main gas valve. The gas hi' h pressure in the chamber 32 can consequent y force the diaphragm downwards according to the reduction 1n pressure in the controlhng lchamber 35. The plate valve 38 is thereby lifted from its seating so that the main' burner 51 is provided with gas which is ignited by the lighter flame (Figure 6). The main burner of the heating arrangement for the liquid, will therefore automatically be put into action as soon as water will be drawn from the apparatus when the lighter flame is burning. In the reverse.y

. which then closes.

' manner Y Suppl In Figure 7 instead of a gas controlling valve being arranged within the easing 22 b'etween the two water chambers 1 and 2 of the hydraulic valve device, a two-armed lever 23 one arm of which engages with the hollow shaft 8 between the diaphragms 6 and 7l is pivoted n a bearing 24 within said chamber. The casing for the controlling gas valve 3 in this modification is completely separated from the casing of the hydraulic valve device, and it is divided by a partition 25 into two chambers 11 and 12 which have connections 13,14 and 17 to the main -gas pipe to the controlling chamber ot" the main gas valve and to the lighter burner in the same manner as shown in Figure 1. The casing ot the controlling gas valve is closed by a diaphragm 26 in the middle of which is secured a plate valve 9 which closes a bore 27 in the artition 25. A spring 29 tends to lift the plate valve 9 from its seat. The plate valve 9 is provided with an edge 30 on its top which is engaged by the flattened end of the lever 23. A tube 19 which projects into the water channel 5 and there forms a throttle passage for the low of water is inserted in the supporting member 8 between the diaphragms 6 and 7, the tube connecting the throttle point with the water chamber 2.

In the construction shown by Way of example in Figures 1 and 3 to 6 the controlling gas valve 3 is combined with the hydraulic valve device by being arranged in the usual between the water chambers of the hydraulic valve device which are closed by diaphragms. 1t is, however, better to separate the controlling gas valve Jfrom the hydraulic valve device as shown in Figure 7 in order to` prevent water penetrating into the gas pipe in the event of one of the diaphragms being damaged.

The controlling gas valvev operated by the How ot water can, of course, be joined with vthe main gas valve.

I claim:

1'. A regulator for the gas supply to a hot water device, comprising a gas supply, a water supply, a throttle pipe in said water a main valve `for said gas supply opera le by a difference of gas pressure on its faces and. a control valve connected to one side of said main gas valve and operable by variation in pressure in said water throttle'pipe.v

2'. VA regulator yigor the gas supply to a het water device, omprising a gas supply, a Water supply, a throttle pipe in said water supply, a main valve for said gas supply operable by a difference ot' pressure on its faces, a control valve connected-to one side of said main gas valve and operable by variation in pressure in said Water throttle pipe and means to reduce the pressure on one side of said control valve to open' said main gas valve.

` w ater supp 3. A regulator for the gas supply to a hot water device, comprising a gas supply, a

vwater supply, a throttle pipe in said water supply, a differential pressure operated main gas valve in said gas supply subjected to the normal pressure on one side and to a controlling pressure on the other and a controlling valve operable in said water throttle pipe and connecting the normal pressure side of said main gas valve with the controlling pressure side.

4. A regulator for the gas supply to a hot water device, comprising a gas supply, a water supply, a supply, a differential pressure operated main gas valve in said gas supply subjected to the normal pressure on one side and to a con trolling pressure on the other, a controlling valve operable by variation 'of pressure in said main throttle pipe and connecting the normal pressure side of said main gas valve with the controlling pressure side and means for opening the controlling pressure side of said control valve to the atmosphere.

5. 'A regulator Jfor the gas supply t0 a hot water device, comprising a gas supply, a water supply, a throttle pipe in said water supply, a differential pressure operated main gas valve in said gas supply subjected to the normal pressure on one side and to a controlling pressure on the other, a controlling valve operable by variation of pressure in said water throttle pipe and connecting the normal pressure side of said main gas valve with the controlling pressure side and a pilot jet connected to the controlling pressure side ot said control valve.

6. A regulator for the gas supply to a hot Water device, comprising a gas supply, a Water supply, a `throttle pipe in said water supply, a tap for controlling the supply oi' Water to said device, a main valve for said gassupply operable by a difference of pressure on its faces, a control valve connected to one side ot said main gas valve and operable by variationin pressure in said water throttle pipe caused by opening of said tap and means to reduce the pressure on one side of said control valve to open said main gas valve.

7. A regulator -for the gas supply to a hot water device such as a geyser, comprising a water supply pipe, a tap for controlling the ly through said pipe to said device, a throttle in said Water pipe, a main gas valve in the form of a disc, a control valve having chambers on both sides which are connected to opposite sides of said main gas valve, and a pilot light which in conjunction with opening of said tap causes said control valve to open and in turn close said main gas valve.

8. A regulator Jfor the gas supply to a het water device such as a geyser, com rising a water supply pipe, a tap for contro ling the by variation of pressurev lllvr water supply through said pipe to said device, a throttle in saidywater pipe, a main gas valve, a control valve having chambers on both sides which are connected to opposite sides of said main gas valve, and a pilot light, a connection from said pilot light to one side of said control valve and a valve adapted to close said connection upon extinction of said pilot light.

9. A regulator for the gas supply to a hot Water device such as a geyser, comprising a Water supply pipe, a tap for controlling the water supply through said pipe to said device, a throttle in said Water pipe, a main gas valve, a control valve having chambers on both sides which are connected to opposite sides of said main gas valve, and a pilot light, a connection from said pilot light 'to one side of said control valve and a thermostatic valve adapted to close said connection upon extinction of said pilot light.

l0. A regulator for the gas supply to a hot Water device, comprising a water supply pipe, a tap for controlling the Water supply pipe through said pipe to said device, a throttle in said water pipe, a differential pressure operated main gas valve, a control valve having chambers on both sides, one side being con' nected to the gas main and the other to the controlling pressure side of said main gas valve, a pilot light, a connection from said pilot light to one side of said control valve, a thermostatic valve adapted to close said connection upon extinction of said pilot light, and a second connect-ion from said pilot light to the normal pressure side of said control valve. I

ll. A regulator for the gas supply to a hot water device comprising a water supply pipe. a tap for controlling the Water supply pipe through said pipe to said device, a throttle in said Water pipe, a differential pressure operated main gas valve, a control valve having chambers on both sides, one'side being connected to the gas main and the other to the controlling pressure side of said main gas valve` a pilot light, a connection from said pilot light to one side of said control valve, a theru'iostatic valve adapted to close said connection upon extinction of said pilot light, a second connection from said pilot light to the normal pressure side of said control valve, aud throttle passages in said connections from the lighter burner to opposite sides of said control valve.

12. A regulator for the gas supply to a hot water device, comprising a gas supply, a Water supply. a throttle pipe in said Water supply, a differential pressure operated main gas valve in said gas supply subjected to the normal pressure on one side and to a controlling pressure on the other, a tubular member communicating at one end with the Water supply adjacent said throttle and serving as a valve spindle, a. water chamber at the other end of said tubular member, a diaphragm on said tubular member forming a closure to said Water chamber and influenced by the water pressure :1t-said throttle, acontrollinggas valve on said tubular member communicating on one. side with the normal gas pressure side 0f said main gas valve and on the other side With the controlling pressure side thereof and a pilot light connected to the controlling pressure side of said controlling valve.

13. A regulator for the gas supply to a' Water heater comprising a gas supply, a, Water supply7 pipe, a main valve for said gas supply operable by differences of gas pressure on its faces, and means including a valve operable by ioiv of Water in said Water supply pipe and a thern'iostatie pilot valve, for controlling the gas pressure on one side of said main valve.

14. A regulator for the gas supply to a water heater comprising, in combination, a gas supply. a Water supply pipe, a main valve for said gas supply operable by differences of gas pressure on its faces, and a control valve operable by flow of Water in said Water supply pipe for connecting one side of said main valve with thel other.

In testimony whereof -I have hereunto affixed my signature.

FRIEDRICH WILHELM STOCKMEYER. 

